Filter-plate.



W. B. KLEIN.

FILTER PLATE.

APPLICATION TILED Mn 2, 1900.

902,972. Patented Nov. 3, 1908.

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UNITED STATES PATENT OFFICE.

WILLIAM B. KLEIN, OF CHICAGO, ILLINOIS.

FILTER-PLATE To all whom it may concern:

Be it known that 1, WILLIAM B. KLEIN, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Filter Press Plates, of which the following is a specification.

The plate of the present invention is intended for use in a filter press of the style which is made up of a plurality of filter plates arranged face to face and compressed together by suitable means to constitute, in effect, a filter for the purpose of filterin beer or other liquids admitted thereto. ilter presses of this style are not ackcd in the ordinary manner but are ma 'e up from a plu rality of plates, each of which has previously been packed, so that in order to set up or assemble the filter press the individually packed plates are arranged in position and compressed together to a suitable degree, thereby constituting a complete filter press of a style quite generally in use. The advanta es of a ress of this kind are due to the fact t iat individual lates can be removed from the press as a w ole and others substituted, and that any desirable number of plates can be used in making u the filter, thereby enabling the user to regu ate the size and capacity of the filter in accordance with the particular conditions encountered.

The object of the present invention is to so construct the filter lates that the filtering body or packing will be firmly and tightly held in position within the surrounding metallic rin so that no difficulty will be ex perienced in having the packing fall out of the ring prior to assembling of the filter.

The invention further relates to the means provided for admitting and withdrawing the iquid and conveying the same through the filtering material, the flow of the liquid being so regulated that the pressure exerted thereby will tend to keep the packing firmly embedded within the ring rather than disengage the packing therefrom, as has been the case in certain prior constructions.

The invention consists of the features of construction and combination of parts hereinafter described and claimed.

In the drawings, Figure 1 illustrates a sectional view of a filter made up in the manner previously described; Fi .2 a face view of the ring of one of the filter p ates; and Fig. 3 an enlarged sectional view of one of the filter plates, showing the packing therein. ;f-[f fj;-'

Specification of Letters Patent.

Application filed May 2, 190B.

Patented Nov. 3, 1908.

Serial No. 430,512.

Each of the filter plates com rises a circular ring or collar 4, preferab y formed of metal, which ring or collar is provided, at suitable points in its periahery, with outwardly projecting ears or lugs 5 and 6, respective y, which are bored out to provide vertical channels 7 and 8 for the inflow and the outflow of the liquid. The ring orcollar, on its inner edge 9, is inwardly beveled or channeled to provide overhanging walls or edges which terminate in the center in an outwardly projecting annular rib 10 rovided on opposite sides with annular teet 1 11 which underlie the overhanging beveled wall of the ring. The rib 10, at a point adjacent the outlet channel 8, is provided with a bore 12 which establishes communication between the center of the ring and the outlet channel. In like manner, at a point adjacent the inlet channel, the ring is provided with a trough-like inlet passa e which communicates with the interior 0 the ring near the surface thereof. The annular rib 10 serves as a support for a pair of circular screens 13 which are preferably connected together in the middle by a suitable clip 14 which prevents the lowermost screen rom displacement prior to the application of the packing.

The packing 15 is inserted into the ring from both sides and is compressed to fil into the s ace underlying the overhanging beveled wa ls of the ring, and is likewise embedded within the annular teeth on opposite sides of the center rib, so that after the packing has been compressed in place it Wlll be thoroughly embedded or mortised into the ring in such manner that accidental displacement will be impossible. After the acking has been thus embedded, the plate 15 completed by roviding a circular screen 16 which overlies the packing.

In order to provide against leakage, when the plates are assembled, a circular washer 17 is inserted between each of the rings, which washer is provided on one side with an outwardly projecting open ton ue 18 which serves to clear the inlet channe and at the same time affords protection against the escape of liquid at this point. A small circular washer 19 surrounds the outlet channel 8, so that escape of liquid is prevented at this point.

In assembling the filter, a number of rings, constructed as above s ecified, are laid one above the other with t e vertical inlet and outlet channels or passages in register and with the washers inserted between the rings to prevent the escape of liquid. The filter press 1s provided with a base plate 20 and a compression cover 21 which serve to compress the individual filter plates together sufiiciently to form the assembled plates into an integral filter structure.

In use, the liquid admitted through the vertical inlet passage will flow laterally therefron'i through the trough-like channels communicating therewith, and the liquid so admitted will enter the meshes of the outer sections of screening which lie intermediate the packing of the adjacent filter plates. The liquid thus admitted to the intermediate screen will flow into the packing on both sides of the screen, and the pressure of the admitted liquid will act against the packing in such manner as to hold it firmly embedded within the annular teeth in the center of the packing rings. The pressure under which the liquid is admitted causes it to filter through the packing and into the inner screen sections, whence it will low through the discharge bore 12 and into the discharge channel or assage. The construction is one which olds the packing firmly in position prior to the assembling of the filter and thereafter maintains the packing properly positioned against displacement under the action of the hqluid admitted to the filter so that the filter W1 I maintain its proper condition for a long period of time.

What I regard as new and desire to secure by Letters Patent is:

1. In a filter plate, the combination of a ring undercut on both sides to provide overhanging walls, a passa e cut through the wall of the ring, a bore leading from the center of the ring and communicating with said passage, a second passage cut through the wall of the ring, and a trough-like channel communieating With said passage and cut through the surface of the ring, substantially as described.

2. In a filter plate, the combination of a ring undercut on both sides to provide overhanging walls, a passa e cut through the Wall of the ring, a bore leading from the center of the ring and communicating with said passage, a second passa ccut through the wall of the rip a trough-1i e channel communicating wlt said passage and cut through the surface of the ring, and an annular rib inwardly projecting from the center of the inner or undercut edge of the ring, substantially as described.

3. In a filter plate, the combination of a ring undercut on both sides to provide overhanging walls, a passa e cut through the wall of the ring, a bore lea ing from the center of the ing and communicating with said as= sage, a second passa e cut through the Wa lot the I'in a trough-hie channel communicatmg wit said passage and cut through the surface of the ring, an annular rib inwardly projecting from the center of the inner or undercut edge of the ring, and annular teeth on said rib, substantially as described.

4. In a filter plate, the combination of a ring undercut on both sides to provide overhanging walls, a passa e cut through the wall of the ring, a bore lear ing from the center of the ring and communicating with said passage, a second passage cut through the wall of the ring, a trough-like channel communicating with said passage and cut through the surface of the ring, an annular rib inwardly projecting from the center of the inner or undercut edge of the ring, annular teeth on said rib, and a packing within the ring and compressed within the overhanging walls and into the annular teeth, substantially as described.

5. In a filter plate, the combination of a ring undercut on both sides to provide overhanging walls, a passage cut through the wall of the ring, a bore leading from the center of the ring and communicating with said passage, a second passage cut through the wall of the ring, a trougl1like channel communicat ing with said passage and cut through the surface of the ring, an annular rib inwardly projecting from the center of the inner or undercut edge of the ring, annular teeth on said rib, a packing within the ring and compressed within the overhanging walls and into the annular teeth, two inner pieces of foraminous material supported upon opposite sides of the inner toothed rib, and an outer piece of foraminous material overlying the outside of the packing, substantially as described.

6. A filter press comprising a plurality of filter plates laid face to face, each of the plates comprising a surrounding ring having inlet and outlet passages cut therethrough to form continuous inlet and outlet channels, the inner ed es of the rings being undercut from both sides and. provided, in the center, with an inwardly extending rib having teeth on opposite sides, the ring having cut through the rib or center-bore communicating with one of the passages and havin cut through the surface of the ring a troug -like channel communicating with the other passage, inner sections of foraminous material supported by the inwardly projecting annular rib, packing sections entered into opposite sides of the ring and inclosing the inner foraminous sections and compressed under the overhanging Walls of the ring and into the annular teeth, and outer sections of foraminous material intermediate the packing of adjacent rings, substantially as described.

WILLIAM B. KLEIN.

lVitnesses:

SAMUEL W. BANNING, WALKER BANNING. 

